The two ends of a chromatid are called :–

Options

A. Nucleosomes
B. Satellite DNA
C. Telomeres
D. Kinetochores

Answer

To answer the question "The two ends of a chromatid are called:", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Chromatids**: A chromatid is one half of a duplicated chromosome. When a chromosome is replicated, it consists of two identical halves known as sister chromatids.

2. **Identifying the Ends of a Chromatid**: Each chromatid has two ends. These ends are crucial for the stability and protection of the genetic material during cell division.

3. **Evaluating the Options**:
- **Nucleosomes**: This option is incorrect. Nucleosomes are structural units of DNA, consisting of a segment of DNA wrapped around a core of histone proteins. They do not refer to the ends of chromatids.
- **Satellite DNA**: This option is also incorrect. Satellite DNA refers to repetitive non-coding DNA sequences and does not pertain to the ends of chromatids.
- **Telomere**: This is the correct option. Telomeres are the protective caps located at the ends of chromatids (and chromosomes). They prevent the loss of genetic information during DNA replication and protect the chromosome from deterioration.
- **Kinetochore**: This option is incorrect. The kinetochore is a protein structure that forms on the chromosome during cell division and is involved in the movement of chromosomes, but it does not refer to the ends of chromatids.

4. **Conclusion**: The two ends of a chromatid are called **telomeres**.

### Final Answer:
The two ends of a chromatid are called **telomeres**.